I had a tooth filled, a molar, the very back one on the left side of my jaw. When the dentis gave me a shots to numb the area everything was fine except for one which went into my jaw and I had extreme pain, so bad that I was shaking like a leaf afterwards. After the numbness wore off the aching pain has continued in my Jaw. It is still bothering me, throbing pain, 8 days after this was done. There is no swelling that I can tell, it is in the jaw area, the same area where he gave me the shot. What could this be from?